04 February 2021

Another planning permission secured for one of our extension projects in Oxford! This side extension will replace a conservatory that’s not fit for everyday use. Although small in size, the extension will transform the way this family uses their home, migrating the dining room from a dark central area of the house, to a light-filled space to the rear looking onto the garden. Mealtimes will be much more enjoyable, as the sun moves from the rear in the mornings, over the south-facing roofights.

The extension will be built to a high standard of energy efficiency, which will help balance the inefficiencies of solid wall construction in this Victorian house. The opening rooflights and bi-fold doors will much improve ventilation, while the client intends to utilise the tall vaulted ceiling space to hang clothes to dry and suspend potted plants. Timber cladding on the outside will create a warm, contemporary aesthetic, using a robust natural material that will slowly silver over time.

Our existing housing stock can often be dark, cold, and draughty. Talk to us if you’d like an architect that specialises in sustainable and ecological design to transform your home.

28 January 2021

We’re reviewing building materials for one of our Oxford house projects, which will consist of brick and a vertical timber cladding to the walls, and a series of zinc pitched roofs. Photos of materials never give a true representation, so it’s essential to review real samples. The greyer brick and zinc provide a more contemporary look, while the more buff brick and red zinc create a warmer feel. Timber on the other hand will change colour over time, silvering as it weathers and ages.

This palette shows three timber samples treated with varying degrees of a water-based silicate protector. This accelerates the ageing process to help timber reach its silver state more quickly and consistently. Likewise, it’s important to consider the type and application of brick. F2 freeze thaw durability and S2 active soluble salts content mean they are suitable for use as an on-edge capping, as well as below DPC where they’ll be exposed to moisture from the ground.

As architects, we choose materials with a long life expectancy and / or low-embodied energy to consider environmental impact, among many other aspects. Talk to us about the impact of your building project.

21 January 2021

Almost exactly one year ago, we joined in with the LETI (London Energy Transformation Initiative)-led response to the Government consultation over their plans for the Future Homes Standard and proposed changes to the Building Regulations. The proposed changes had fundamental flaws, allowing the use of low carbon technologies to pass a carbon target. Using ‘carbon’ as a metric, as opposed to ‘at the meter energy’ could have led to inefficient homes appearing to perform well.

In a U-turn, the Government will be retaining FEES (Fabric Energy Efficiency Standard) in Part L. This will encourage architects and designers to adopt a ‘fabric first’ approach, to make new homes highly energy efficient, which will be key to tackling our climate emergency. In addition, the government has formally scrapped a proposed block on local authorities setting their own energy efficiency standards for new homes in their local plans, at higher levels than Building Regulations.

While standards could be more stringent and timescales more ambitious, this is generally a positive step forward, especially in light of our recent partnership with the Oxford Zero Carbon Homes Initiative.

14 January 2021

What is BIM? BIM or Building Information Modelling is essentially a process, designed to create and manage information for construction projects. It facilitates the coordination of information within a design team, improving efficiency and minimising room for error. The output is a digital 3D model, where each and every component of the building is described in data. This forms an intelligent map of a building, where many elements of the documentation can be automated.

For us as architects, it does mean more legwork up front through inputting of information. However, it streamlines the process over the course of a project and encourages us to think about how something we design might be built. For clients and end-users, we’ve found that 3D images and in particular walk-throughs really help to visualise the final outcome. It’s especially helpful for irregular spaces, for example within a vaulted roof, which can be difficult to visualise in plan.

We use BIM on every project and would find it challenging to go back to the ‘traditional’ way of working! Talk to us if you have an architectural project that you’d like to explore with us.

07 January 2021

The Oxfordshire Zero Carbon Homes Initiative (OZCHI) was launched last month. Achieving zero carbon homes (embodied, operational, and connection to the natural world) across the board must be made a priority to help tackle our climate and biodiversity crisis. Making new build homes zero carbon is even more important, as we don’t want to add to our future retrofit problem. While new build should be an easy win, there are still many barriers to overcome.

This initiative will help to break down those barriers to make zero carbon homes a pragmatic reality. Sow Space wholeheartedly supports the initiative and is proud to be a partner, alongside Oxford Friends of the Earth, Greencore Construction, Bioregional, and Jessop and Cook Architects. As a first step, we need key stakeholders who are involved in housing or house-building in any capacity to complete our short survey here, and to share it far and wide.

To find out more about the OZCHI, or how to partner with or support the initiative, you can visit the Oxford Friends of the Earth website here or talk to us.

17 December 2020

Another new retrofit project! We love doing these. This client found us through a previous client – it’s always satisfying to be referred through a job well done. We’ll be looking to extend this 1950s semi, which is the best time to consider a low energy retrofit too. With the client’s fixed budget, we’ll be helping them look at different retrofit options and to prioritise what works for them. If it can’t all be done at once, we can look at careful phasing, to prevent work being undone in the future.

As with our last new job, we’ll be aiming to create flexible and adaptable spaces for home working. There’s an assumption that home working results in a net reduction in emissions due to reduced commuting travel. However, a CREDS study has shown a ‘rebound’ effect due to greater use of home appliances, heating, cooling, and lighting, as well as increased ‘non-work’ travel. This highlights how doubly important it is to retrofit our homes as home working becomes a new norm.

Making your home energy-efficient can make your office energy-efficient too. Talk to us if you’d like to create additional home working space and reduce energy consumption at the same time.

10 December 2020

Window thermal performance and the terminology that comes with it can be confusing. Manufacturers may quote u-values for certain elements of the window, but it’s the whole window u-value we’re interested in, and even better, the installed window u-value. Generally, the glazing has a higher performance than the frame, so the less frame the better. We therefore need to know the area and length of frame / glazed edge (psi values) to understand the whole window u-value.

The British and European standard for calculation is for the whole window u-value, so this is what we should expect from manufacturers. However, the Passivhaus methodology also takes into account how the window is installed into the wall. This gives a more complete picture of a building’s fabric performance, and highlights the importance of robust window installation detailing, i.e. where in the wall a window should be installed and how thermal bridging can be minimised.

We have a good grasp of building fabric performance, which is key to designing for low energy and thermal comfort. Talk to us about your low energy retrofit, extension, or new build project.

03 December 2020

We’re very fortunate that the projects are coming thick and fast. Our latest new project involves tearing down this garage to make better use of the site. We love the bold colour of this door against the neutral coloured render, but the garage is no longer fit for purpose, with crumbling walls and an asbestos roof. It makes way for a two-storey side extension, to provide extra living accommodation at ground floor, and additional bedrooms / home office spaces at first floor.

The pandemic and resultant working from home boom has meant that home office spaces are now regularly at the top of the agenda. We have always encouraged flexible and adaptable use of space, and this has become key to the home working culture. Work space by day, living space by night, guest room by occasion, carefully planning the layout of a room means it can have multiple functions. Furniture and storage become particularly important in these circumstances.

Creative use of space is what architects are good at. We love space-planning and the challenges that come with it. Talk to us if you’re considering adding to or altering the space within your home.

26 November 2020

Bamboo has a long history in construction. As a building material, it has a high strength-to-weight ratio and grows at an astonishing rate, with some species growing 91cm per day. This makes it highly versatile with huge potential for sustainability and carbon sequestration. However, some natural forests in Asia have been cleared for bamboo plantations, to then be distributed around the world. This should be taken into account when considering its environmental impact.

We attended a practical workshop where we learnt about the principles of bamboo construction, putting them in to practice by building a small temporary structure. We were surprised at how easy bamboo is to handle and construct with, using basic tools such as hand saws, drills, and files. Reclaimed tyre inner tubes were used to secure the connections. The end result was incredible strength using very few pieces, which stood the test of several people hanging on it!

We have the passion to explore various forms of construction techniques, while considering its wider environmental impact. Talk to us about the opportunities available for your architectural project.

19 November 2020

Planning permission granted! Following a long drawn out process, we finally received consent to make external changes to this Victorian terrace in the St. Clement’s and Iffley Road conservation area (CA). The changes include replacing the uPVC casement windows with double-glazed timber sash, inserting rooflights, and installing two solar PV arrays. Together with a series of retrofit measures, these changes will improve the energy efficiency and thermal comfort of the property.

Normally, such changes would fall under permitted development (PD), as this particular CA is not subject to an article 4 direction. However, as this property was split out as a maisonette from the original, it’s not afforded the same PD rights. This put it under the scrutiny of the conservation officer, who wanted traditional weighted sash windows, whereas the house next door can freely install any windows they like. This highlights the serious flaws within the planning system.

Navigating the planning system can be a bit of a maze. Knowing which retrofit measures require planning permission and which can be done under PD is not always clear. Talk to us to learn more.